Having the right information on hand when your flight gets cancelled can mean the difference between getting rebooked or being stuck in the airport. Create your own info "packet of power" before each trip so you're ready to exercise your air travel rights when you need to.
Image from Butz.2013.
Your packet will be invaluable, but it will only contain just three pieces of information: You'll need the airline's phone number so you can call instead of lining up with everyone else to talk to the gate agents. You'll also want a copy of your airline's terms and conditions or "contract of carriage" so you can insist agents help you if the cancellation is the airline's fault.
The final item your "packet of power" needs is a list of other airlines that also fly your route. It will make rebooking easier since you can look up alternative flights yourself if your flight is cancelled and no one can help. Having your flight cancelled is frustrating, but as long as you've prepared this information and are pleasant to the airline reps, you'll improve your chances of getting your trip back on track.